I never knew that

You know that song "I Saw Mommy Kissing Santa Claus"? Well, until this morning I thought it was about a little kid seeing his mom actually kissing the real Santa Claus. Then, this morning, I hear on the radio that it's really about a kid seeing his mom kissing his dad who's only dressed as Santa. Well what do you know? All these years I thought it was an odd little song about a boy watching his mom be unfaithful to his dad and it turns out that it's actually a peppy little tune about a kid watching his parent's do a little role playing.